Sat, 20 Aug 2011 20:24:12 +0200 wenzelm discontinued "Interrupt", which could disturb administrative tasks of the document model;
Sat, 20 Aug 2011 20:00:55 +0200 wenzelm more direct balanced version Ord_List.unions;
Sat, 20 Aug 2011 19:21:03 +0200 wenzelm reverted to join_bodies/join_proofs based on fold_body_thms to regain performance (escpecially of HOL-Proofs) -- see also aa9c1e9ef2ce and 4e2abb045eac;
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